At an axial load of 25 kN, a 45-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.9 mm while the bar width contracts 0.19 mm. The bar is 220 mm long. At the 25-kN load, the stress in the polymer bar is less than its proportional limit. Determine (a) the modulus of elasticity. (b) Poisson's ratio. (c) the change in the bar thickness. Answers: (a) E= (b) v= (c) Athickness= i i GPa mm
At an axial load of 25 kN, a 45-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.9 mm while the bar width contracts 0.19 mm. The bar is 220 mm long. At the 25-kN load, the stress in the polymer bar is less than its proportional limit. Determine (a) the modulus of elasticity. (b) Poisson's ratio. (c) the change in the bar thickness. Answers: (a) E= (b) v= (c) Athickness= i i GPa mm
Materials Science And Engineering Properties
1st Edition
ISBN:9781111988609
Author:Charles Gilmore
Publisher:Charles Gilmore
Chapter6: Introduction To Mechanical Properties
Section: Chapter Questions
Problem 6.4P
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![At an axial load of 25 kN, a 45-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.9 mm while the bar width contracts 0.19
mm. The bar is 220 mm long. At the 25-kN load, the stress in the polymer bar is less than its proportional limit.
Determine
(a) the modulus of elasticity.
(b) Poisson's ratio.
(c) the change in the bar thickness.
Answers:
(a) E=
(b) v=
(c) Athickness=
i
i
GPa
mm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faace3cdb-03cb-471e-b17f-d9d3c0a80ab9%2F0bf9142c-a25b-449c-aa2a-37d62882ec05%2F5thhpqc_processed.jpeg&w=3840&q=75)
Transcribed Image Text:At an axial load of 25 kN, a 45-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.9 mm while the bar width contracts 0.19
mm. The bar is 220 mm long. At the 25-kN load, the stress in the polymer bar is less than its proportional limit.
Determine
(a) the modulus of elasticity.
(b) Poisson's ratio.
(c) the change in the bar thickness.
Answers:
(a) E=
(b) v=
(c) Athickness=
i
i
GPa
mm
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